$\left(140-3x\right)^2$
$f\left(x\right)=7x^3-16x+18x-4$
$\frac{d}{dx}\left(x^{-2\sqrt{x}}\right)$
$\left(2f+8\right)\left(2f-5\right)$
$15x+2=47$
$\:9x-8y-5y$
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